Railway-signal



(No Model.) 2 sheets-sheet 1.

D. 0. STEWART RAILWAY SIGNAL.

No. 560,071. Patented May 12, 1896.

q; R a; wa l ANDREW B samnmmu \XTHQWASHINGTUILDC 2 Sheets-Sheet 2.

(No Model.)

D. G. STEWART. RAILWAY SIGHAL. No. 560,071. Patented May 12, 1896.

UNITED STATES PATENT OFFICE.

DAVID C. STEIVART, OF IVARREN, OHIO.

RAILWAY-SIG NAL.

SPECIFICATION forming part of Letters Patent No. 560,071, dated May 12,1-896. Application filed March 9 1894. Serial No. 503,052. (No model.)

To all whom it ncay concern:

Be it known that 1, DAVID C. STEWART, of \Varren, in the county ofTrumbull and State of Ohio, have invented certain new and usefulImprovements in Railway-Signals; and I do hereby declare the followingto be a full, clear, and exact description of the invention, such aswill enable others skilled in the art to which it appertains to make anduse the same.

This invention contemplates'certain new and useful improvements inrailway-signals and it has for its object the production of simple andhighly eificient means for automatically ringing an electric belllocated at or near a road crossing or tunnel by an approaching train,and which will be automatically thrown out of operation after the trainhas passed such crossing.

The invention comprises two circuit-closing boxes having electricalconnections with a bell or the like and designed to have their circuitsclosed by a passing train, an intermediate relay to which both of saidcircuitclosing boxes are connected, the same having a movable armaturewhich is thrown into and out of engagement with the magnets of the relayby the operation of first one and then the other of said circuit-closingboxes.

The invention also comprises improvements in the details ofconstruction, combination, and arrangement of parts substantially ashereinafter fully set forth, and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a view with the tracks inperspective and illustrating on an enlarged scale in side elevation thearrangement of my improved signaling device. Fig. 2 is a view inperspective of one of the circuit-closing boxes. Fig. 3 is a detailthereof. Fig. 4 is a view of the relay. Fig. 5 is a detail.

Referring to the drawings, A A designate two tracks, and a; a roadcrossing the same. Along one side of one of the tracks are three poles(L a a, the latterbeinglocated adjacent to the cross-road and the twoformer some distance on either side thereof.

B B designate two circuit-closing boxes, one attached to two of the tiesof each track on a line with the poles a CL, and (J O are two similarboxes, one for each track, on a line with or near the pole a Each boxhas lateral lugs b for attaching it to the railroad-ties and is providedwith an upper cross-bar l), which serves to keep the cover (not shown)in place. In one end of the box is an opening b through which isdesigned to be extended a bar 11 which is rigidly secured at its outerend to one of the rails of the track, which rail will be depressed whenthe train passes thereover, thereby depressing said bar at the sametime.

D is an arm pivoted at its lower end on a lug d of a lower cross-bar (1,said lug fitting in a slit in said bar, a nutted bolt d passed throughcoincident holes, forming the pivotbearing. The upper end of this bar isreduced and has a beveled shoulder (F, with which bar 1) comes incontact when depressed. A lug or block b is attached to the inside ofthe box opposite the pivoted arm, so that in case the bar 6 shouldbecome loose it will still be crowded over onto the arm. This bar isnormally held in the position shown in Fig. 2*

by a coiled spring (2*, attached thereto and to one side of the box, andto said bar is connected a rubber block E, having a screw e extendingtherefrom, to which one wire w is connected. A bent brass arm 8 isconnected to one side of the box, a rubber block e3 being interposedbetween .the same and the box. From the inner portion of this arm 6projects a threaded screw f, having a nut f. To this screw is connectedthe wire w. When the bar b moves the pivoted arm D, the screw e of thelatter is made to contact with the brass arm e, thus closing thecircuit. The wire w leads from the box B underground to the base of polea, up the latter, and is connected to overhead wire A branch wire 10leads from this wire to a battery 41:, which is connected by a wire mwith a relay E. The return connection is through a wire a, leading fromthe relay to a second overhead wire 00 which communicates with the box Bby a branch wire The other outer box B is connected by wires y 'y' withthe overhead wires. The box O is connected to battery w and relay F bywires 1 y a third wire 3 connecting said battery to said relay. The box0 is connected with the wires 1 41 by wires y. The foregoing arrangementof relay, batteries, the. may be inclosed in a box attached to post a onwhich the bell is secured. The drawings do not, however, show the partsso inclosed, the box or covering being omitted and the parts shownenlarged for the sake of perspicuity.

The relay F comprises two sets of magnets G G, between which ispivotally mounted a wabbling iron or armature H, the movement of whichis limited by set-screws h h of an overhanging arm 72 Connected to thewabbling iron or armature H is awire 50 leading to a bell X which latteris connected by a wire 00 to a battery so, and from said battery ispassed a wire :0 which is connected by any suitable means to theset-screw h in the overhanging arm 71 lVhen the circuit is closed, saveby the depression of bar 19 in box B, the wabblin g iron or armature Hwill be drawn to the magnet G and the bell-connecting circuit beingclosed by contact of said wabbling iron or armature with the set-screw hthe bell will commence to ring. Thus a signal is given as the trainapproaches the cross-road or tunnel, and after the last wheel of therearinost car of the train has passed beyond box 13 the circuit formedthrough box C will close, charging the magnet G, which will draw thewabbling iron away from magnet G and against set-screw It, thus breakingthe bell-circuit and causing the bell to cease ringing. The

current from battery m is prevented from passing through set-screw hwhen the wabbling iron H is resting thereagainst by any suitableinsulating material surrounding said screw where it is passed throughthe overhanging arm 7L2.

The operation of the circuit-closers of the track A is identically thesame as that above described of the closers of the track A.

It is obvious that the invention can be adapted for use on a single aswell as a double track.

The advantages of my invention are apparent to those skilled in the artto which it appertains, and it will be specially observed that the sameis extremely simple and being composed of but few parts is not liable toreadily get out of order or be deranged.

I claim as my invention- 1. The circuit-closer herein described,comprising the box, the pivoted spring-held arm provided with a beveledshoulder and having a circuit-wire connected thereto, a depressible barin juxtaposition to one of the rails of a track and designed to engagesaid beveled shoulder, and a contact-arm to which the other circuit-wireis connected, substantially as set forth.

2. The combination with the box having an opening in one end, and alower cross-bar provided with a lug, of the arm pivoted on said lughaving an upper beveled shoulder, a depressible bar in juxtaposition toone of the rails of a track and designed to engage said arm, a springconnected to said arm and a screw projecting therefrom, and an armconnected to the box on a line with said screw and having a screwextending from its inner end, substantially as set forth.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

DAVID C. STEWART.

lVitnesses:

H. F. HARRIS, GEO. W. UPTON.

